LTP-2157AC Equivalent & Substitute Parts

Part Overview

The LTP-2157AC is a 5 x 7 dot matrix display module manufactured by Lite-On Inc., featuring a red LED configuration with common anode row and common cathode column internal connections. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The module operates at 1.8V forward voltage with a 12mcd brightness rating and is housed in a compact 1.50" L x 2.09" W x 0.34" H form factor.

Substiute Parts

LTP-2157AC

Lite-On Inc.In Stock: 852LTP-2157AC Datasheet

Current PartRFQ

TC20-11EWA

KingbrightIn Stock: 694TC20-11EWA Datasheet

MFR RecommendedRFQ

TC20-11SRWA

KingbrightIn Stock: 1156TC20-11SRWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTP-2157AC are qualified based on the following critical parameters:

• Configuration: Must be 5 x 7 dot matrix
• Color: Must be red
• Internal Connection: Must be common anode row, common cathode column
• Size / Dimension: Must match or be compatible with 1.50" L x 2.09" W form factor
• Voltage - Forward (Vf): Must operate within acceptable range (1.8V nominal)
• Moisture Sensitivity Level: Must be MSL 1 or equivalent

The substitute parts identified are manufactured by Kingbright and maintain identical configuration, color, internal connection topology, and form factor compatibility. Both substitutes are active products with current availability and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both Kingbright substitutes maintain functional and mechanical compatibility with the LTP-2157AC. Selection between TC20-11EWA and TC20-11SRWA depends on brightness requirements:

TC20-11EWA operates at 2V forward voltage with 10mcd brightness, providing the closest brightness match to the original 12mcd specification.

TC20-11SRWA operates at 1.85V forward voltage with 48mcd brightness, offering significantly higher luminous intensity for applications requiring enhanced visibility.

Both substitutes are active products with current inventory availability and hold ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can TC20-11EWA and TC20-11SRWA be used interchangeably with LTP-2157AC?

A: Both parts maintain identical 5 x 7 configuration, red color, common anode row/common cathode column internal connection, and compatible form factor. Forward voltage differences (2V and 1.85V respectively versus 1.8V) and brightness variations (10mcd and 48mcd versus 12mcd) require circuit evaluation for specific applications.

Q: What is the significance of the forward voltage difference?

A: The LTP-2157AC operates at 1.8V nominal. TC20-11EWA requires 2V and TC20-11SRWA requires 1.85V. These variations may affect current-limiting resistor calculations in driving circuits and must be verified against circuit design parameters.

Q: Are there mechanical compatibility concerns?

A: Both substitutes maintain the 1.50" L x 2.09" W footprint. Height differences are minimal (0.34" versus 0.33"), presenting no practical mechanical interference in standard PCB layouts.

Q: What compliance certifications apply to the substitute parts?

A: Both TC20-11EWA and TC20-11SRWA are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: Why is the LTP-2157AC classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts from Kingbright provide equivalent functionality with current manufacturing support and inventory availability.